Motor-cycle.



C. J."G-USTAFSON. MOTOR CYCLE;- APPUCATION FILED-MAY I5, 1916.

LQ%9,072. Patented Dec. 4,1912.

, IN V EN TOR.

WITNESS ATTORNEYS.

entrain s rains ra'rnn'r oriuon.

cm. JOHAN oUs'rArsoN,. or SPRINGFIELD, MASSACHUSETTS, nssrenon TO rrnnnnn or MASSACHUSETTS;

Specification of Letters Patent.

MAn rAc'rUR ne cor/Lenny, or" SPfiINGFIELD, MASSACHUSETTS, A CORPORATION Moron-032cm.

Patented Dec. 4, 191

Application mime, 1916. Serial No. 97,637.

To aZZ wlwin z't flicg ooncerfi'; i U Be it known that I, QannJprrAn QUs'r F- son, a subject of the K ng of Sweden, residing at Springfield, inthe county of Hamp-' flexible driving connection s' between'each thereofand the rear wheel, andimproved frame arranged to support said devices-1n an improved manner so that e ther may be moved to and from the rear wheel independently of the other to ,vary the "P81151011 of the driving connectlonsiwithout displacinglthe rear wheelin the frame.

. Another object of the invention is to pro viderin a motor cycle, an improved frame construction characterized by strength and simplicity andarranged particularly for an advantageous and adjustable mounting of the engine thereon. 1 f V Other objects andadvantages Wlll appear in the following description and in the appended claims. y y

.-.For the purpose of llustrating one manner in which the invention may be practised, one preferred embodiment thereof is shown inthe accompanying drawings, in wlncl 1 a Figure 1 is aperspective view offthe 1mproved frame construction;

. Fig. 2 is a side elevationalview, with.

parts broken away, showing the arrangement of the driving devices on theframe; and a t I ,Figs. 3 and 4' are cross sectional views takenon the lines 3- 3 and 4-4, respectively, of Fig. 2 and looking in the direction of the-arrows.

Referring to these drawings, the frame is made up in the well known manner from a plurality of tubes which areconnecte'd together by suitable fittings. :1 front steeras they ing post 1 receives a front fork 2 in the usual manner, and the latter is supported from a front wheel 3. A rear driving wheel 4 isfmounted in a frame comprising upper and lower forked members '5 and 6, respectively, and the wheel 4 may be moved in slots 7 in the frame by means of adjusting screws'S, all in the usual manner. In front of wheel 4 is an uprlght 9, and the members .5 and 6'are connected, as clearly shown in Figs. 1and'2, to the upper and lower ends of the uprlght, respectively. A single tube 10 connects the upper ends of the steering post 1 and upright 9, and the lower ends of these elements are connected by two tubes 11. The latter, as best shown in Fig. 1, extend forwardly and horizontally from the base ofupright 9 in spaced parallel relation to a point adjacent the rear of wheel 3. Thereafter, they extend upwardly to post. 1 in a curve around the wheel 3 and the curved portions of the bars converge, pass upwardly,as clearly shown in Fi The spaced parallel horizontal portions of ing devices for the rear wheel 4. These devices usually comprise an engine and pedal cranks, each arranged to drive the rear wheel independently of the other. The engine may be of any suitable type, but for the purposes of illustration has been shown .as of the double opposed type which may be advantageously used with the particular frame construction heretofore described. The engine has been indicated in Figs. 1 and 3 in conventional form only and forthe present purposes, it will suffice to state that it comprises a central crank case 12 and axiallyalined cylinders 13 on either side thereof. The crankcase 12 restsdirectly upon the tubes 11, as shown in Fig. 3, and

may be clamped thereto bya pair of plates 14 and bolts 15 which latterare threaded into the bottom wall of the crank case. The fly wheel of the engine is indicated at 1 6 and between the flywheel and the crank case is a pulley 17 which is connected by a suitable belt 18 to a pulley 19 secured to wheel 4. Betweenthe crankcase 12. and

upright 9. 'is a hanger 20'whichdepends tubes 11 are arranged to support the drivpermitted;

of the bcltand chain.

from the tubes 11 and may be clamped thereto by a plate 21 and bolts 22, as best shown in Fig. 4L; Mounted iii-the, bracket 20 aretlie usual pedal cranksQS and on one of the latter is a sprocket 24 which is con nectedeby a chain 25 to a suitable sprocket 26 O1itl ie rear'wlieelet, a 1

Tlie'bracket 20 and crank case 12 are movable along tubes 11 to any position desired within the limits of upright 9 and front wheel It is to be-noted particularly, 1.

that the upwardly bent portions of tubes 11 are spaced suliicientlyto permit the left The frame is not a radical departure from existing standards and differs essentially only in the tubes 11. The pair of tubes, as against a single tube, permit the engine to be rigidly supportedsolely from the tubes and'atva single point by simple means. No elaborate suspensions nor tie bars are necessary, and all tliat is required is to lay the engine upon the tubes and apply the plates 14. Y a

, Inthe operation of motor cycles, trouble has arisen in properly adjusting-the tension of the driving belt and chain. Theengine belt, due to'fit's' more frequent operation, stretches more rapidly than the chain from the pedal cranks. In order to tighten one, it has been necessary also to tighten the other as by moving wheel lrearwardly in Slots? by means of screws 8. It will thus be Seen tliat,if belt 18 is adjusted to the ,orode'r" tension chain 25 is n uc'htoo ti ht and, if'the, latter is adjusted to the proper tension, belt'lS is much too loose. The difficulty lies in lack of independent adjustment However, with the arrangement described, the engine may be conveniently moved along tubes 11 to tighten belt 18 the proper amount without disturbing the adjustment of chain 25, as by moving the rear wheel. If both belt and chain are slack, of course, the wheel 4- may be moved as described to simultaneously effect the adjustment of both but the usual condition is that one only is slack so'uthat it isdcsirableto provide means whereby either may be. moved relatively to the other to adjust their respective driving connections properly.

The; invention has been described in a single preferred form "for illustrative purposes, but the scope of the invention is defined by the appended claims rather than by theforegoiiig description 1 \Vhat I claimsis V f v. 1. The combination in a motor cycle, of a frame l1t1 Vll1g tW0,Sp1QQ parallel bars, automaticand foot ope -abiepropeiiing devices independently, sinfiouiited for! sliding movements on said "bars; means to secure said devices in their various positions of adjustment, a driving Wheel mounted in said frame, and flexible driving connections between each'of said devices and said wheel, all constructed and arranged. so that the tension of each coii'iiection inayfbe indepencb ently varied by sliding its, respective "propelling'deviceon saidbars, 7 2'; Thecombina'tioni a. motorcycleof a frame having; are spaced parallel bars,

of an engine supported thereon andadapte'd to be moved longitudinally with respect thereto, means to" clamp the 'engiiie to the frame, a bracket depending from said-bars and adapted "to be moved"longitudinally thereon, means 'to claiiip the bracket to the bars, pedal cranks mounted "in said bracket, a drive Wheel mounted in the frame, "and independent flexible driving" connections from the engine and cranks *to; the drive 51 wheel, allconstructed and arranged so that the tension ofeacliconnectioninay beadjusted independently of the-other, *and without moving the drivewheel, by sliding I the engine or bracket on saidbarsi i 3. The combination "in a ,motor' cycle of a frame having tWo sp'aced parallel and substantiallyhorizontal bars, a drive ,wheel rotatably moifiiitedtherein and arranged for adjustment relatively thereto, tin-engine resting-j upon said bars and "adaptedfor sliding 'niovements thereon, means to clamp the engine to said bars; a hanger dependingfrom the bars and adapted for sliding movement thereon, means to clamp the 17? hanger to the bars, pedal cranks mounted in the hanger, and independent flexible driving connections from the cranks and the engine tosaid Wheel, all constructedand arranged "so thattl e tension of either connection may be ad usted independently of the other and so that the tension of ibothmay be varied snnultaneously by moving the rear wheel in its frame.

f A inotor'cycle, coniprising,,. front and rear wheels, forks therefor, a steering post to receive the front fork, an upright in front of the rear wheel connected at "its upper end to the rear fork, m'eansconupper ends ofthe latter and said steering post, two bars connecting the low r ends of the post andfi pright, thelast-nained 'jnecting the lower ends ofthe latter and said uprightya single" bar connecting the bars arranged to lie in spaced paralleh horizontal relation 'fi'om' tlieupright to a point adjacent the front Wheel and being said bars, the upwardly bent portions of bent from said point upwardly around the the latter being spaced sufiiciently to permit front Wheel in converging relation, an ena cylinder to pass therebetween, all con- 10 gine slidably mounted on said horizontal structed and arranged so that the engine 5 portions, and means to clamp the engine to Y may be moved horizontally Within the limits said portions, the engine having opposed 0f the upright and front wheel. 7 cylinders arranged in parallel relation to CARL JOHAN GUSTAFSON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patente, Washington, D. 0." 

